Java Developer Job Descriptions, Average Salary, Interview Questions

What Does a Java Developer Do?

Java developers specialize in creating applications and software solutions that use the Java programming language. Java is a popular and widely used programming language that can be used to develop a variety of software products, from mobile apps to web-based applications.

A Java developer typically develops, designs, tests, and maintains Java-based software applications. The developers use Java programming tools and frameworks to create software that meets the functional requirements of the application they are working on. Among other things, this involves working with databases, building user interfaces, and integrating APIs from third parties. In addition to a strong understanding of the Java programming language, Java developers must also understand the principles of software development, such as object-oriented programming, testing, and debugging.

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National Average Salary

Java developer salaries vary by experience, industry, organization size, and geography. To explore salary ranges by local market, please visit our sister site

The average U.S. salary for a Java Developer is:


Java Developer Job Descriptions

Example 1

If you love technology and want to work in a place where you can practice the art of good software design, this is a great opportunity to explore.

Key responsibilities

  • Technical analysis
  • Create development/unit testing plan
  • Code development & testing
  • Support unit, QA, and system testing of application code
  • Deliver commitments within timelines and quality parameters

Education, skills, and experience needed

  • Four-year bachelor’s in computer science, engineering, or a related technical field
  • The candidate must have 2 – 5 years hands-on development experience using Java (version 8.x) & J2EE
  • The candidate must have hands on experience with open-source application servers such as Apache Tomcat
  • Demonstrate working knowledge of Spring/Spring boot, JPA
  • Demonstrate working knowledge of Restful and SOAP web services
  • Demonstrate working knowledge of Spring Batch, Javascript, Angular.JS, and HTML5
  • Demonstrate working knowledge of leading solutions that we have employed: Maven, Jenkins, Git & Github, JSON, XML, Docker, Rest client, Postman, etc.
  • Good to have experience in No-SQL database preferably MongoDB
  • Java certifications preferred
  • A team player with good communication skills
  • Customer service orientation
  • This is a remote position and can be located anywhere in continental U.S. or Canada

Example 2

You should have good experience in building high-performing, scalable, enterprise-grade applications, and be able to write clean code and ensure your programs run properly. We expect you to be comfortable with the HTTP protocol, REST APIs, web servers and data processing. We also expect you to be passionate about building software, able to take ownership of problems, and work well on a team as well as take individual ownership of projects (e.g. feature development).


  • Design and develop high-volume, low-latency applications for enterprise-level systems with high availability and performance
  • Create well-designed, testable, efficient code
  • Participate in all phases of the development lifecycle
  • Take initiative to improve the code you work in (i.e. leave every place better than you found it), and investigate alternatives and technologies in order to support continuous improvement


  • Strong experience in software development, and particularly in test-driven development
  • 2+ years experience of working in a Java Developer position preferred
  • Strong analytical and problem-solving skills with close attention to detail
  • You’ll get bonus points if you have:
  • Experience of object-oriented analysis and design using common design patterns
  • Good knowledge of relational databases, SQL, and ORM technologies—including JPA2 and Hibernate
  • Good knowledge of distributed analytics (e.g. Redshift, Kibana, Elasticsearch, etc.)
  • Good knowledge of at least one popular web framework (e.g. Jersey, JSF, Wicket, GWT, Spring MVC, etc.)
  • Strong communication, teamwork, and time-management skills

Example 3


  • Develop new applications and reporting per request
  • Provide Level 3 support for inbound data file conversion, payment processing, and data reporting
  • Work directly with our Integration Solutions department to translate development requests
  • Complete data setups and file regeneration by client request
  • Conduct local QA testing and assist other teams with QA as needed during the Software Development Life Cycle
  • Build and maintain team Standard Operating Procedure documents
  • Other tasks and projects as assigned


  • Bachelor’s degree in Computer Science, related technical degree or commensurate experience is required
  • 2+ years Java experience preferred
  • 2+ years experience with SQL preferred
  • Implementing microservices which use the spring boot framework
  • Connecting microservices to interact with databases
  • Experience working with tools like Git, Maven, JFrog, UDeploy, etc.
  • Demonstrate programming skills using JSON, Web Services, SQL, etc.
  • Working knowledge with Oracle or Mongo DB databases
  • C# experience is a plus
  • Proficient at research for troubleshooting and developing solutions
  • Ability to assess an issue and escalate as appropriate
  • Excellent communication skills, both written and verbal
  • Proactive work style and creative problem solver who can handle multiple projects, demonstrating a strong work ethic
  • Excellent attention to detail, quality, and follow-through; commitment to continuous improvement and the elimination of performance variability
  • Demonstrated ability to adapt to rapidly changing requirements with a flexible and creative approach to brainstorming, troubleshooting, and problem solving

Sample Interview Questions

  • What are some of the recent projects that you have worked on?
  • What do you consider to be the major features of Java?
  • What’s the difference between a path and a classpath variable?
  • Is Java Pass By or Pass By Reference?
  • What’s the final Keyword in Java?
  • What are the access modifiers in Java?
  • What’s a static import?
  • What is Enum?
  • What is Composition?
  • Can you explain the Java Reflection API?
  • What’s the volatile keyword?
  • How would you write a custom exception?
  • What is OutOfMemoryError?
  • Can you have an empty catch block?
  • What are the types of JDBC drivers?

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